All I remember is they are a couple in school and they're trying to have seggs which eventually they can finally did it. The uke does not want to at first but he ended up liking it. I forgot the title please help meee and thank you

The plot is too general... but is it this one: Hatsukoi Encounter? x)

I'll take a shot too: Sukebe no Seishun? I remember the couple in this one waited until their university exams were over.